Metamask: React-Native App that connects to Metamask Wallet

Integrating MetaMask with your React Native app: Retrieving a user’s public address

When starting your project, ensuring seamless integration with third-party services is crucial to ensuring a robust and user-friendly experience. In this article, we’ll explain how to configure Metamask in a React Native app to retrieve a user’s public address.

Prerequisites

• Make sure you have Node.js installed on your computer.

• Install the Metamask CLI by running “npm install -g metamask-cli” or “yarn global add metamask-cli”.

• Create a new MetaMask wallet account and obtain a private key (also known as a “metamask private key”).

• Familiarize yourself with the React Native library to interact with the web browser, especially with web NFC and web wallet APIs.

Step 1: Install the required libraries

In your project directory, run the following command to install the required libraries:

”bash

npm install @react-native-web-nfc @react-native-web wallet

or
''bash
yarn add wallet @react-native-web-nfc @react-native-web

Step 2: Configure the MetaMask API

Create a new file called “meta_mask.js” in the same directory as your main project file “index.js”. This file will be the entry point for interacting with Metamask.

import WebNFC from "@react-native-web-nfc";
import { Wallet } from "@react-native-web wallet";
const MetaMaskApi = () => {
const handleWebNFC = async () => {
try {
await WebNFC.requestPermission();
} catch (error) {
console.error('Error requesting permission:', error);
}
};
return (
webNfcHandler={handleWebNFC}
walletName="MetaMask"
privateKey="your_metamask_private_key_here"
/>
);
};
default export MetaMaskApi;

Step 3: Integrate the Metamask app with React Native

In the index.js file, import and initialize the MetaMask API:

import React from 'react';
import ReactDOM from "react-dom";
import MetaMaskApi from "./meta_mask";
const App = () => {
const handleMetamaskReady = async(wallet) => {
if (wallet) {
console.log('Metamask wallet ready:', wallet);
// Use the wallet instance to get the user's public address
const publicKey = await wallet.getPublicAddress();
return public key;
}
};
React.useEffect(() => {
MetaMaskApi.handleWebNFC().then((wallet) => handMetamaskReady(wallet));
}, []);
return 
Metamask Program
;
};
ReactDOM.render(, document.getElementById('root'));

Step 4: Use the public key you received

Once Metamask is initialized, your app can retrieve the user’s public address using the wallet instance’s getPublicAddress() method.

const publicKey = await wallet.getPublicAddress();
console.log(publicKey);

Conclusion

In this article, we successfully integrated MetaMask into a React Native application to retrieve a user’s public address. By following these steps, you can seamlessly integrate Metamask with your project and provide a reliable user experience.

Don’t forget to replace your_metamask_private_key_here with the actual private key obtained from MetaMask.

Thanks for reading! If you have any questions or need further assistance, please feel free to ask.

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